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1、Subject 498A 1285 Walt Whitman Road Melville, L.I., NY 11747 January 15, 2001 TO: Ad Hoc Group of Underwriters Laboratories Inc. for Current Taps and Adapters, Consumer Advisory Council of Underwriters Laboratories, Inc., Electrical Council of Underwriters Laboratories, Inc., Subscribers to ULs Stan
2、dards Service for Current Taps and Adapters SUBJECT: Request for Comments on Proposed Requirements for the First Edition of the Standard for Current Taps and Adapters, UL 498A; PROPOSED EFFECTIVE DATES SUMMARY OF TOPICS This bulletin proposes the following changes in requirements: 1. Additional and
3、Revised Requirements Regarding Number of Outlets and Line Blades, Supplementary Overcurrent Protection, and Supplementary Circuitry 2. Revised Grounding Requirements 3. Revised Miscellaneous Requirements COMMENTS DUE: March 12,2001 Attached as Appendix A for your review and comment are proposed requ
4、irements for UL 498A. Questions regarding interpretation of requirements should be directed to the responsible UL Staff. Please see Appendix B of this bulletin regarding designated responsibility for the subject product category. Please note that proposed requirements are of a tentative and early na
5、ture and are for review and comment only. Current requirements are to be used to judge a product until these requirements are published in final form. PRODUCTS AND INDUSTRIES AFFECTED BY THE PROPOSAL UL requests your assistance in identifying other products or industries that might be affected by th
6、e requirements contained in this bulletin. UL suggests that all suppliers or customers for these products and industries be made aware of these requirements prior to their proposed effective date. Also, please forward your suggestions to UL so that these products and industries may be identified in
7、future bulletins. COPYRIGHT Underwriters Laboratories Inc. Licensed by Information Handling Services COPYRIGHT Underwriters Laboratories Inc. Licensed by Information Handling Services SUBJECT 498A -2- JANUARY 15,2001 PROPOSED EFFECTIVE DATES The proposed requirements specified in Items 1 and 2, with
8、 the exception of paragraphs 9.13, 13.2.2 and Figure 13.1 will necessitate a review and possible retest of currently Listed or Recognized products. Therefore, UL proposes that the new requirements become effective April 1, 2009. This is intended to provide manufacturers with sufficient time to submi
9、t modified products for investigation and to implement the necessary changes in production. Please note that this also includes the time that will be needed by UL to conduct a review of the modified product. The remainder of the requirements will not necessitate a review or additional testing of cur
10、rently Listed and Recognized products. Therefore, UL proposes that these requirements become effective upon publication. REQUEST FOR COMMENTS ON PROPOSALS Please provide the following: 1. Your comments concerning the proposed requirements; and 2. Your comments concerning the proposed effective dates
11、, should the proposals be adopted. Comments should be made in writing and may be sent by fax to (864) 574-7980 or by mail to the attention of Patricia Sena at ULs Melville office, 1285 Walt Whitman Road, Melville, NY 11747-3081. Comments may also be sent via E-mail to Patricia.A.SenaQ us.uI.com. Ple
12、ase reference all correspondence to Subject 498A. All comments should be sent by March 12, 2001. Unless specifically requested to do so, UL will not acknowledge comments indicating concurrence with these proposals. UNDERWRITERS LABORATORIES INC. REVIEWED BY: PATRICIA A. SENA Senior Project Engineer
13、Standards Department Phone/Fax: (864) 574-7980 E-mail: Patricia.A.SenaQ JON F. SCHUE-TTE (Ext. 22624) Engineering Group Leader Conformity Assessment Services 301 6T SR: CAA bu12000041 9; PAS; Ip COPYRIGHT Underwriters Laboratories Inc. Licensed by Information Handling Services COPYRIGHT Underwriter
14、s Laboratories Inc. Licensed by Information Handling Services SUBJECT 498A -Al - JANUARY 15,2001 APPENDIX A PROPOSED REQUIREMENTS AND PROPOSED EFFECTIVE DATES FOR THE FIRST EDITION OF THE STANDARD FOR CURRENT TAPS AND ADAPTERS, UL 498A For your convenience in review, proposed additions to existing r
15、equirements are shown underlined and proposed deletions are shown thed-e or COPYRIGHT Underwriters Laboratories Inc. Licensed by Information Handling Services COPYRIGHT Underwriters Laboratories Inc. Licensed by Information Handling Services SUBJECT 498A -A6- JANUARY 15,2001 b) Be provided with supp
16、lementary overcurrent protection as described in 15.7. 9.7 added as revised and relocated from 9.4 effective April 1, 2009 9.8 A device with two sets of line blades and up to six outlets: a) Shall not have more than three outlets per set of blades; and b) Shall comply with 9.12 and 9.13. Added 9.8 a
17、dded as revised and relocated from 9.3 effective April 1, 2009 9.9 A device with more than six outlets and one or two sets of line blades shall: a) Be provided with supplementary overcurrent protection as described in 15.7; b) Inhibit, in any position, the electrical use of the other outlet when mou
18、nted on or plugged into a duplex receptacle provided with contact spacings as shown in Figure 9.1; c) Be provided with a means other than the blades, such as a screw, for mounting to the receptacle; and d) Comply with 9.10 and 9.1 1 (as applicable) when provided with two sets of line blades. Added 9
19、.9 effective April 1, 2009 9.10 A device provided with a second set of line blades for increased stability that are electrically isolated from the line contacts of the outlets (“dummy blades“) shall comply with 9.12 and 9.13. Added 9.1 O effective April 1, 2009 9.1 1 A device provided with a second
20、ground pin for increased stability (not necessarily isolated from the grounding contacts of the receptacles) shall comply with 9.12 and 9.13. Added 9.1 1 effective April 1, 2009 9.12 A device provided with two sets of line blades shall comply with all of the following: a) The distance between the tw
21、o sets of blades shall be in accordance with Figure 9.1; Exception: Devices marked in accordance with 7.8.1 (c) are not required to comply with this requirement. b) The device shall be marked in accordance with 7.8.l(a) and (b); and COPYRIGHT Underwriters Laboratories Inc. Licensed by Information Ha
22、ndling Services COPYRIGHT Underwriters Laboratories Inc. Licensed by Information Handling Services SUBJECT 498A -A7- JANUARY 15,2001 c) When the device employs line blades of the 1-15P configuration, the line blades and contacts shall employ only the polarized construction. Added 9.1 2 effective Apr
23、il 1, 2009 9.13 A device provided with two sets of line blades shall not employ an electrical connection between the two sets of line blades associated with each outlet of the duplex receptacle. 9.13 added (date of publication) COPYRIGHT Underwriters Laboratories Inc. Licensed by Information Handlin
24、g Services COPYRIGHT Underwriters Laboratories Inc. Licensed by Information Handling Services SUBJECT 498A -A8- JANUARY 15,2001 I D I Figure 9.1 Blade and contact spacing Added Figure 9.1 effective April 1, 2009 No. 6-32 Mounting Screw (Optional) 1-15 (Nong rou nd i ng ) No. 6-32 Mounting Screw (Opt
25、ional) I I - 0.63- - 1.53 f I I I I 5-15 (Grounding ) S3778C COPYRIGHT Underwriters Laboratories Inc. Licensed by Information Handling Services COPYRIGHT Underwriters Laboratories Inc. Licensed by Information Handling Services SUBJECT 498A -Ag- JANUARY 15,2001 9.14 A device intended for installation
26、 requiring the removal of a receptacle cover plate shall comply with the following: a) The device shall be able to be fully inserted in the outlets; and b) The device shall be able to be fully seated against the wall such that the outlet box opening in the wall is completely covered. Added 9.1 4 eff
27、ective April 1, 2009 9.15 A device intended for installation where neither the receptacle cover plate or its mounting screw are intended to be removed shall be able to be fully inserted in the outlets with the receptacle cover plate in place, independent of the overall dimensions of the cover plate.
28、 Exception: A device intended for installation over a receptacle cover plate with specific dimensions shall be provided with installation instructions in accordance with 8.2.2. Added 9.1 5 effective April 1, 2009 9.16 A device intended for installation where the receptacle cover plate is not intende
29、d to be removed but the mounting screw is intended to be replaced with the mounting screw of the device shall comply with the following: a) The device shall be able to be fully inserted in the outlets with the receptacle cover plate in place, independent of the overall dimensions of the cover plate;
30、 Exception: A device intended for installation over a receptacle cover plate with specific dimensions shall be provided with installation instructions in accordance with 8.2.2. b) The device shall provide electrical continuity between any metal cover plate and the cover plate mounting screw boss of
31、the receptacle on which the device is intended to be mounted. Exception: A device provided with installation instructions requiring the user to replace the metal cover plate with a non-metallic cover plate in accordance with 8.2.4 is not required to comply with this requirement. c) The device shall
32、be capable of mechanically securing the receptacle cover plate to the receptacle. Exception: The device is not required to comply with this requirement when the device completes the enclosure of live parts, independent of the receptacle coverplate. Added 9.1 6 effective April 1, 2009 COPYRIGHT Under
33、writers Laboratories Inc. Licensed by Information Handling Services COPYRIGHT Underwriters Laboratories Inc. Licensed by Information Handling Services SUBJECT 498A -Al 0- JANUARY 15,2001 15.6 Supplementary circuitry Added Subsection 15.6 effective April 1, 2009 15.6.1 A device provided with suppleme
34、ntary circuitry shall comply with all applicable requirements for that circuitry. The standards used to evaluate these devices include, but are not limited to, the following: a) The Standard for Transient Voltage Surge Suppressors, UL 1449. b) The Standard for Electromagnetic Interference Filters, U
35、L 1283. c) The Standard for Secondary Protectors for Communications Circuits, UL 497A. 15.6.2 A device provided with supplementary circuitry shall provide the function of the supplementary circuitry to all outlets of the device. Exception: A device employing two sets of line blades is not required t
36、o provide this function to all outlets of the device when the device is plainly marked to identify the blades and corresponding outlets provided with the supplementary circuit function. 15.7 Supplementary overcurrent protectors Added Sub-section 15.7 effective April 1, 2009 15.7.1 A supplementary ov
37、ercurrent protection device shall: a) Be of the automatic-trip manual-reset type; b) Be capable of clearing a fault current of not less than that indicated in Table 15.1; and c) Comply with the requirements in the Standard for Supplementary Protectors for Use in Electrical Equipment, UL 1077. The su
38、pplementary overcurrent protection device shall have been subjected to the Overload Test in UL 1077, tested for motor starting at 6 times the AC full load current rating. A supplementary overcurrent protection device is not prohibited from being ambient compensated. Exception No. 1: A fuse that is c
39、apable of clearing a fault current of not less than that indicated in Table 15.1, and that complies with the requirements in the Standard for Low-Voltage Fuses - Part 14: Supplemental Fuses, UL 248-14, is not prohibited from being used as a supplementary overcurrent protection device. Exception No.
40、2: A circuit breaker that complies with the requirements in the Standard for Molded-Case Circuit Breakers, Molded-Case Switches, and Circuit-Breaker Enclosures, UL 489, and is in accordance with the National Electrical Code, ANSI/NFPA-70 for branch-circuit protection, is not prohibited from being us
41、ed in lieu of a supplementary overcurrent protection device. COPYRIGHT Underwriters Laboratories Inc. Licensed by Information Handling Services COPYRIGHT Underwriters Laboratories Inc. Licensed by Information Handling Services SUBJECT 498A More than 1875 to 3750 More than 3750 -Al 1 - 2000 3500 JANU
42、ARY 15,2001 20 21 Table 15.1 Circuit capacity of supply source Glow Wire 3 High-Current Arc Resistance to 3 24 22 24 15.7.3 A supplementary overcurrent protector shall not be connected to the equipment-grounding conductor. Dielectric Voltage Withstand 6 Mold Stress Relief Dielectric Voltage Withstan
43、d 15.7.4 When supplementary overcurrent protection is required in accordance with Table 9.1, the rating of the overcurrent protector shall not be greater than the ampacity of: a) The device; b) The configuration of the receptacles it is to protect; or c) Other electrical components that carry load c
44、urrent, whichever is lower. 15.7.5 A device provided with supplementary overcurrent protection shall be subjected to the Supplementary Overcurrent Protector Temperature Test, Section 37. Exception: Devices that are not required to have supplementary overcurrent protection but employ fuses shall be s
45、ubjected to the Fuseholder Temperature Test, Section 34. Table 18.1 Summary of tests - Current taps and adapters Revised Table 18.1 effective April 1, 2009 I I Section Test sequences I No. of devicesa 19 Comparative Tracking Index 5 Ignition I (Repeated) I Details Materials to be evaluated in accord
46、ance with Exception No. 1 to 10.3.1. Materials to be evaluated in accordance with Exception No. 1 to 10.3.2. Materials to be evaluated in accordance with Exception No. 2 to 10.3.2 All devices. Devices employing thermoplastic materials. Devices subjected to Mold Stress Relief Test. Table 18.1 Continu
47、ed on Next Page COPYRIGHT Underwriters Laboratories Inc. Licensed by Information Handling Services COPYRIGHT Underwriters Laboratories Inc. Licensed by Information Handling Services SUBJECT 498A -A12- JANUARY 15,2001 Table 18.1 Continued Section Test sequences No. of devicesa Details 23 Moisture Abs
48、orption Resistance 3 Conducted on vulcanized fibre, fuseholders and insulating backplates. Use insulating material portion of device only. 25 27 Accelerated Aging Security of Blades 6 Materials to be evaluated in accordance with the Exception to 10.4.1. Devices rated 15A or less and 250 V or less. 2
49、6 Insulation Resistance 6 %m+wkhd 0 evices molded of rubber or similar materials, or any material containing enough free carbon to render the material grey or black. 27 Security of Blades 6 Devices rated 15 A or less and 250 V or less that are not subjected to the Accelerated Aging Test. 28 Contact Security 6 Devices with havina 1-1 5P configuration blades only. 29 30 31 32 33 Retention of Plugs 3ve rload Temperature Retention of Plugs (Repeated) Resistance to Arcing 6 Devices with havina a 1-15R, 5-15R, 5-20R, 6-15R, & 0 6-20R configurations. Devices with havina a 1-15R, 5-15R, 5-2
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